Key result
Abnormal base-ring tilt (≥7 degrees for aortic or ≥11 degrees for mitral prostheses) was associated with an increased incidence of significant perivalvular regurgitation.
Why the study?
Does cinefluoroscopic evaluation of base-ring tilt identify significant periprosthetic cardiac valve regurgitation in patients with prosthetic mitral or aortic valves?
Case-Control (n=550)
Does cinefluoroscopic evaluation of base-ring tilt identify significant periprosthetic cardiac valve regurgitation in patients with prosthetic mitral or aortic valves?
Abnormal base-ring tilt or an abnormal increase in base-ring tilt on cinefluoroscopy provides strong supportive evidence of partial prosthetic valve dehiscence.
Answers are grounded in this paper and cite their sources.
May support cinefluoroscopy for perivalvular regurgitation suspicion in prosthetic valves; leaves open prospective validation before clinical adoption.
The results of cinefluoroscopic evaluation in 509 patients in whom there was no evidence of prosthetic mitral or aortic valve regurgitation were compared with those in 41 patients who had perivalvular aortic or mitral regurgitation. Rotational motion of the base ring of each prosthesis (base-ring tilt) was measured in at least two views. A base-ring tilt of 7 degrees or more for aortic prostheses or 11 degrees or more for mitral prostheses was associated with an increased incidence of significant perivalvular regurgitation. Likewise, in patients who had multiple studies, a change between studies in base-ring tilt of 4 degrees or more for aortic prostheses or 5 degrees or more for mitral prostheses was associated with significant perivalvular regurgitation. These data suggest that the presence of either an abnormal base-ring tilt or an abnormal increase in base-ring tilt is strong, supportive evidence of partial prosthetic valve dehiscence.
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Green et al. (1988) conducted a case-control in Prosthetic mitral or aortic valve (n=550). Abnormal base-ring tilt on cinefluoroscopy vs. Normal base-ring tilt was evaluated on Significant perivalvular regurgitation. Abnormal base-ring tilt (≥7 degrees for aortic or ≥11 degrees for mitral prostheses) was associated with an increased incidence of significant perivalvular regurgitation.
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